Sand-mill.



A. F. Hovv.

SAND MILL. APPLICATION FILED FIEB`l 7, 1916.

Patented Man 6, 1917.

2 sHEETs-SHEET 1.

A. F. HOWE.

SAND MILL.

APELxcATloN FILED FEB.7.1916.

1,21 8,4593. v Patented Maf'. 6, 1917.

2 SHEETS-SHEET 2.

narran sfamare amr er@ ANDREW F. HOWE, OF GRANITE QITY, ILLINOIS, ASSIGNOR TIC) COMMONWEALTH STEEL COMPANY, OF ST. LOUIS, MISSOURI, A CORPORATION OF NEW JERSEY.

SAND-MILL.

Specification of Letters Patent. Patented D131'. 6, 1917.

Application filed February` 7, 19,16. Serial No. 76,724.

To all whom z't may concer/n:

Be it known that I, ANDREW F. HOWE,

a citizen of the United States, residing at' Granite City, in the county of Madison and State of Illinois, have invented a new and useful Improvement in Sand-Mills, of which `the following is a specification.

My invention relatesto a sand mill,'which ordinarily consists of a circular-shaped pan on which are rollers, and having an upper circumferential rim o r Hange, the pan being partly filled witliwsand to be mixed, which on the revolution ofthe pan passes beneath and is crushed and kneaded by the. rollers, thereby necessitating, when thebatch is iinished, the removal of the sand from the pan by shovels.

My invention has for its obj ect to dispense with the said riml or flange and provide means for automatically eecting an uninterrupted passage of the sand beneath the mixing rollers and delivery therefrom, and from the pan when desired, into a waiting receptacle or on to a conveyer without the use of shovels or other hand-operated tools.

It consists in features of novelty as hereinafter described and claimed, reference be- A ing had to the accompanying drawing forming part of this specification, whereon,

Figure l, is 'a top plan of my improvedv sand mill, and Fig. 2, an end elevation thereof.

Like letters and numerals. of reference denote like parts in both figures.

My improved sand mill comprises-a horizontally arranged circular-shaped table a which is the equivalent of the ordinary pan used in this class of' mill, without the circumferential rim or flange thereof.

The table a is iixed centrally to an upright shaft Z) which passes therethrough and is journaled at its lower end below` the table a in astep-block or bearing c secured to the foundation of the machine, the upper portion of the shaft b above the table a passing througlia preferably, bushed bearing (Z fixed tothe top cross beam e of the framework of the machine.

To the upper end of the vertical shaft b above the cross 'beam e is fixed a bevel toothed wheel 1 y(shown by dotted lines in Fig. 2) which is engaged by a bevel toothed pinion 2 fixed on. a horizontal shaft,l 3

(broken away) which is mounted in bear and adapted toA be rotated by belt and pulley or otherwise as found most suitable.

On the table a are mounted preferably,

two, circular rollersf which normally bear' .obedient to the action of the latter in their operation on the sand as hereinafterr particularly referred to," each end portion vof the axle g beinginclosed in a vertically elongated box-shaped pocket 5 which prov jects from the inside face of the corresponding side piece 7L, of the framework ofthe machine,'and on the axle g there is an adjustably fixed collar 6`which bears against the face of the pocket 5 and so prevents longitudinal movement of the axle g; similarly, each roller f is held in positionon the axle g by two collars lSawhic-h are adjustably fixed on the axle g and bear respec- -tively, against the ycorresponding'side-of the roller f. lFurthermore, through the axle g in the middle isformed a vertical and longitudinally elongated opening 7 which. surroundsA and permits free rotation ofthe vertical shaft b without obstruction by the 'aXle'g when vthe latter is displaced vertically in the operation of the machine.

Connecting the two opposite side pieces )t of the framework together below the top cross beam e and at a suitable distance from the tablea, are two horizontal cross braces or beams i, one-on each side of the vertical vshaft b, and fromeach brace 71 at right angles thereto and at each side thereof, to

soA

wit, outwardl toward the edge of the table i aand inward y toward the vertical shaft b,

projects a horizontal arm j having a vertical slotway 8 therethrough which extends practically the 4entire length of the two arms'j and through the brace z'.

Spanning the single slotway 8 thus formed is a series of preferably, rectangularshaped washer plates 9, 10, arran elrr pairs, the plates 9, l0, of each pair 'being opposite to each other, above and below the slotway 8 respectively, as shown, the said ,pairs of the series being at suitable intervals along the arms j, and through each pair ofwasher plates 9, 10, passes vertically a screw-threaded rod 11 having upper and lower nuts 12, 13, which are adapted to tighten and hold the washer plates 9,l 10, to

the arms j. j

To the bottom end of each rod 11 is pivotally mounted a preferably, concavecircular revoluble disk 7c which is arranged in a preferably, vertical plane, and approxiilo `mately in contact with the upper surface of the table a, the disk k, by meansof the nuts 12,13, being adjustable to any desiredinclination to a radius'of the table, and distant from`the latter. Also, projecting outward from each brace z' adjacent and parallel to the corresponding arm and inthe .saine plane therewith, is an arm j', the arm j of one brace z' being to the right, and that of the other brace i, to the left of the vertical shaft Z2 as seen in Fig. 1, each arm y" h-aving a slotway 8', upper and lower washer plates 9, 10', screw-threaded rod 11, nuts 12', 13, and concave circular revoluble disksc, all vthe said parts being similar to the corresponding parts of the arms y' above described, except that on the rod 11 above the upper nut 12 is fulcrumed a hand leverl 14 which extends therefrom outward beyond the 'edge ofy the table a within, reach of the operator, the lever- 14 being provided wit-h a- 7c and gate 19 can be closed together, or

vbetween them as desired.

separated from each other to form a space In operation, assuming the disks k and c to be in their several Vpositions respectively, as seen particularly` in Fig. 1, with the gate or delecting plate 19 at the upper side of the vertical shaft b closed against and alined with the corresponding disk la', and with the gate or deflecting'plate-19 at the lower side of the shaft b openedoutward and separated from the corresponding disk 7c so as to leave a space ce between them, rotation being imparted to the table a in the direction of the arrows y, and. consequently by the vtable a, tothe rollers f inthe directionVV of the arrows the sand to be mixed being fed through a pipe' 2O (indicated by dotted lines) `or in any other suitablekmanner, and with the sand, waterthrough an auxiliary pipe (not shown) or otherwise, is deposited on the table a, preferably, at the middle thereof adjacent to the right hand roller f and being revolved with the table a will thereby be carried in apractically circular path, and owing to centrifugal force, gradually ldirected outward toward the edge of the table a, and in sodoing passes between the table a and one ofthe rollers f by which v it is crushed and kneaded, passing therefrom between the disks lo and c and by a and the other roller f by which it is further mixed and kneaded and passestherefrom partly, between the disks s tobe again passed beneath the rollers f and partly eventually between the outermost disks 7c, 7.2, and the gate or deflecting plate 19 toward the outer edge of the table a from which it is delivered by centrifugal force on to a conveyer`21 (indicated by dotted linesin Fig. 1) or into any other suitable receptacle.

By having both the gates or deflecting plates 19 in the open position as seen in Fig. 1 at the lower side of the vertical shaft Z) the sand may be retained on the, table a for any vthese guided and directed between the table i peatedly passed armore or less number of itimes between the table a and rollers f' before being discharged from the table a.

l claim In a sand mill, the combination of a circular table pivotally supported and revoluble in a horizontal plane, a roller axially revoluble in a vertical plane and adapted to bear as' l circumferentially on the table at `,right anl gles to a radius thereof, a pivotally mounted ice circular disk revoluble in a practically vertical planeat an inclination to' a radius of the table, and approximately in Contact circumferentially vwith the latter, means for varying `thesaid inclination, a deecting i plate adapted to vcoperate with the said disk, and means for rotating the table.

ANDREW r. Hows.

Witnesses l KARL S.' HOWARD, E. J. GAYLORD. 

